A group of researchers from the University of Tokyo led by Kenji Shiba has developed a technology for wireless transmission of data from the depths of the human body.
Previous generation wireless implants were equipped with compact antennas, with the help of which the transmission of data on the state of the body was carried out. However, in conditions where, for example, capsule endoscopes are miniature in size, an antenna, even very tiny, becomes an unaffordable luxury.
The new technology involves the transmission of a weak current through human tissue using two electrodes, one of which is on the implant, and the other on the body surface. When different potentials are applied to the electrodes, the voltage between them begins to change. These changes are recorded by doctors using special equipment.
In the experiment carried out, the dimensions of the inner electrode were 10 x 8 mm, and the outer one was 20 x 20 mm. The frequency at which the data was transmitted corresponded to approximately 600 kHz.
In the future, scientists plan to combine their technology with wireless charging, which will make it possible to avoid using batteries and make implants even smaller.